A Precongress Meeting at the World Congress of Dermatology will be held to discuss about terminology of Ashy Dermatosis, lichen planus pigmentosus, erythema dyschromicum perstans and idiopathic eruptive macular pigmentation. This Global Forum is convened to come to some consensus in terminology and work on further research to understand these conditions better, with a view to improving prevention and treatment. All pigmentary disorders experts interested in the subject of acquired macular hyperpigmentation of uncertain aetiology(LPP,AD,EDP,IEMP) are welcome to participate. This forum is supported by the Asian